Overview
Features and Benefits
- Reduces External Components and Total Cost
- No Schottky—Synchronous Operation
- All-Ceramic Capacitors, Compact Layout
- Reduces Number of DC-DC Regulators to Stock
- Wide 4.5V to 60V Input
- Each Output Adjustable From 0.9V to 92%VIN
- Pin-Selectable 560kHz or 300kHz Switching Frequency
- Independent Input Voltage Pin for Each Output
- Reduces Power Dissipation
- Peak Efficiency > 90%
- PFM Mode Enables Enhanced Light-Load Efficiency
- 1μA Shutdown Current
- Operates Reliably in Adverse Industrial Environments
- Hiccup Mode Overload Protection
- Adjustable Soft-Start Pin for Each Output
- Built-In Output Voltage Monitoring with Active-Low RESET for Each Output
- Adjustable EN/UVLO Threshold for Each Output
- Monotonic Startup Into Prebiased Load
- Overtemperature Protection
- High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range
Product Details
The MAX17521 dual-output, high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input. The converter can deliver up to 1A at each output. Each output is programmable from 0.9V to 92%VIN. The feedback voltage regulation accuracy over -40°C to +125°C is ±1.7%.
The MAX17521 uses peak-current-mode control. Each output can be operated in the pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes.
The MAX17521 is available in a 24-pin (4mm x 5mm) TQFN package. Simulation models are available.
Applications
- CPU, DSP, or FPGA Power
- Distributed Supply Regulation
- General-Purpose Point of Load
- Industrial Control Power Supplies
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (2)
Documentation & Resources
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MAX17521 Reliability Data1/12/2023
Tools & Simulations
EE-Sim® Power Tools
The EE-Sim DC-DC Converter Tool uses your requirements to quickly create a complete power design including a schematic, BOM with commercially available parts, and time and frequency domain simulations. Your customized schematic can be downloaded for further analysis in the standalone EE-Sim OASIS Simulator, featuring SIMPLIS and SIMetrix SPICE engines.

SIMPLIS Models
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
---|---|---|---|---|
MAX17521ATG+ | Material Declaration | Reliability Data | 24-LFCSP-4X5X0.75 | |
MAX17521ATG+T | Material Declaration | Reliability Data | 24-LFCSP-4X5X0.75 | |
Wafer Fabrication Data | MAX17521 Reliability Data |
Support & Discussions
Sample & Buy
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Buy Now Pricing
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List Pricing
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Lead Times
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Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.